Multicylinder block for air cooled engines



Aug. 27, 1935. c. 5. BROWN 7 MULTICYLINDER' BLOCK FOR AIR COOLED ENGINESFiled April 4, 1954 2 Sheets$heet 1 ZVENTOR. M%/

ATTORNEYS Aug. 27, 1935.

c. 5. BROWN 2,012,740

MULTICYLINDER BLOCK FOR AIR COOLED ENGINES Filed April 4, 1934 2Sheets-Sheet 2 231F012. B %//%/%W/ ATTORNEYS.

Patented Aug. 27, 1935 30 Other objects appear throughout the specificaof metal between the cylinder bores, curve inward r v ,012,746 vv MULTICYLINDERBLOCK. FOR AIR COOLED e J' ENGI NES .;,QI., '(lharle's S;Brown, Syracusa- 1 Application April 4, 1934, Serial No. 718,973 I a i rr newal? l I This invention relates tom'ulti-cylinder blockssagabr-passages; 5extending lengthwiseof the for air cooled engines, andhas forits'object a I bores b'etween the same, said passage preferablycylinder block 'havinga passage, or passagesfln being open at itsupperand lower ends for the the portion thereof between the cylinde'r borespassageof air; andbeing so located as toallow so arranged as tocompensate for distortion of cxpansion and contraction of the massof.metal" J5 the mass of metal between the bores, and difierbetween the"bores without causing :misalinee ences in expansion throughout thewhole block, nt' t i y i bores; a d o p for and thus avoid misalinementsand undue distor' fi i expan throughout the Whole tion of the bores asthe cylinder block heats, and block and the liners; I The passage- 1 1at 1 when casting. I i I 1 upper end, into the surrounding air intospace 101 0 It further has for its object, an arrangement between the CydSrO h o g t e ho of heat radiating fins, particularlyalongthe sides inthe head if the heads areaf sing e block, of the block and themass' ofmetal between the contradistinction'toindividualheadsQ-"I'l'le pasbores, to quickly conduct theheat to the cooling sage communicates, atits lower end; with; the a 1; air current, and an upright passagebetween the urrounding air 1 througha transverse P 5 5 bores, whichpassage is preferably 'open at its I 1 l'Jassagea i in the block.Thepassage ends to facilitate the cooling, and to prevent p fm V or i' ad j undue distortion of the mass of metal between Pr fe bly;they de b rs 2 a -p dthe bores. a s with 'sleeveliners 6, usually-of a ferrous'metal" 0 It further has for its object, a multi-cylindera'SiCaSt iron;1 Whibh'isj b dd d in: t air cooled block in which the cylinder boresare body du g" e oi e' i y Q dY' 'j provided with sleeve liners embeddedtherein to usually u m, al i form a'good mechanical and ther'mal'unionbey aJ having 'g fl edt ndl t V-i tweenthe liners and the body of theblock, to-' than ironfor' steel-i" The siderort sl f t gether with apassage between the bores in-which flanges, on? the sides off-the blockand pr j n g5 portions of the peripheries of adjacent liners are m he-mss r po o of the-body which X- exposed, the body of the block and, it hat tends betweenthe bores, are continuous of the radiating flanges beingof a metal having a d portions of the flang s, that is, e portionsgreater heat conductivity than that of the sleeve, around the ends ofthe block. The outer faces or liner. of the side portions 4 of theflanges, and the mass tion. slightly out of a straight line. r

The invention consists in the novel features n O der to fo m a 5 0dmechanical and therand in the combinations and constructions heremal, orheat conducting union between the sleeve 7 inafter set forth andclaimed. liners 6 and the body, the liners are provided with 35 Indescribing this invention, reference is had peripheral flanges 1 whichare embedded in the to the accompanying drawings in which like oharbodyI, and portions 8 of these liners with their acters designatecorresponding parts in all the flanges are exposed in the air passage 5.This views. air passage 5 is usually located between the cyl- Figure 1is a plan view of a multi-cylinder air inder bores where they arenearest together. 40 v cooled block embodying my invention. As seen inFigures 1 and 4, these sleeves or Figure 2 is a sectional view on line2-2, Figliners 6 are provided with flanges 9 at their'upure 1. per orhead ends which lap thehead ends of the Figure 3 is a sectional view online 3-3, Figblock around the bores, and are of suflicient width ure 2.to'be provided with holes in for receiving the 45 Figures 4 and 5 arerespectively a plan View, screws, or bolts, or other members whichsecure and an elevation, of one of the sleeveliners. the heads of thecylinder to the blocks, and wide Figure 6 is a plan view, similar toFigure 4, enough for seats for gaskets, the block being of a slightlymodified form of liner. formed with holes alined with the holes ID forFigure 7 is a fragmentary, sectional view taken receiving the bolts. Asshown'in Figures land I on line 'I--1, Figurefi. 4, the flanges 9 arerectangular'in general form. v This multi-cylinder block for air cooleden- However, as seen in Figures 6 and 7, the flanges gines comprisesgenerally, a body I formed with H, corresponding to the flanges 9, maybe annu- I aplurality of cylinder bores}, circumferentially lar andembedded in the body I flush with the extending heat radiating flanges3, and a pas-. upper face of the'body so that the screws, or bolts,

which secure the heads to thebody, thread directlyv into the head, andnot through the flange. In forming this cylinder block, the sleeves, orliners, are properly set in the mold, and the body of aluminum alloy, orother metal having relatively high heat conductivity, cast around thesleeve. The block is also for'med with a suitable base flange l2 bywhich it is mounted upon the crank case ofthe engine. i i .1 f

One or more of these multi-oylinder blocksm'ay be usedin a singleengine,either V type, or inline type, and a cooling air current is blown in adirection lengthwise of the blocks, or the flangesf3,

and directed in any suitable manner topass' crosswise thereof betweenthe blocks. The large mass of metal between the cyl nder walls absorbsheat from the cylinder bore's and equalizes or tends to equalize the:absorption of f i of the portions of the flanges around the ends of Vthe block, the body being of a metal having a the heat from portions ofthe walls between the cylinder bores with the remaining portions'of thewalls of the cylinders, which are more. inthedi; rect path of the aircurrent. The: ventilating pa sage 5 through this intermediate mass-ofmetal between the cylinder bores. tends toequalize the cooling. of theintermediate mass; between the cylinderboreslwith theeooling of the:outer sides. f'the mass exposed more directlyto the cooling. aircurrent, or, tends to avoid: localizing of the heat in the p rtion ofthemassbetweenthebores. This cylinder,blocku.is,.comperable in. costgofmanufacture a multiwoylinder block for. water c le engines and owing oits construction, makes it'p ss1b1etobring thecost ofan efiicient, aircooled engine: to'that of a water. cooledengineb What; claim is; .& 1,.Am ul i-ieylinder. block for, air cooledengines p i ing abody formedwith a lurality 0! cylincler bores, heat radiating flanges encirclingthe body withthe portions; thereof; on the sides of the, blockcontinuous'jacross the portion of the;

b y between the bores Land; with a passage. ex

- endin enethwisenotthe bores. in the portion.

where thebores are closest togethen the. bores. be-i n: provided withsleeveliners; embedded in the body, said, liners beinglexposedyin saidpassage.

- 2-, A ,multioylinder'block forair cooled engines comprising a bodyformed with a plurality of cylinder bores, heat radiating flangesencircling the body with the portions thereof on the sides of the blockcontinuous across the portion of the body between the bores, and with apassage exy .3. A multi-cylinder engine block comprising a' b'ody formedwith a plurality of cylinder bores, sleevelliners in the bores andhaving peripheral projections embedded in the body, the body havingheatradiating flanges extending around the body and the portions of theflanges on the sides oil the v.hloclebetween the bores being continuousreater heat conductivity than the liners, the portion otithe bodybetween the bores and-the liners. being formed with a passage extendinglengthwise; l of the bores in which passage the contiguous pore-,5 tien,oij the liner and projections are exposed, wherebylocalizationoi heatin the portion or the.

blookhetween the liners is avoided.

7 4.;A multi-cylinderfengine block comprising a,

bod, formed :With a plurality of cylinder bores, sleeve liners in thebores and having peripheral projections embedded' in the body, the bodyhaving heat radiating flanges; extending around vthe body, andtheportions of the flanges on thesidesv of ,theblock between theoboresbeing continuous.

of theportions of the flanges aroundtheends of the block, the body beingof a metal, having a greater heat conductivity than the -1iners, th eportion of. the body between the bores and the liners being formed witha passage extending lengthwise'ofthe. bores, portions of the sleeveliners being expgs ed in said passage, whereby naked portions of-the,linersare'exposed in said passage and localiz ng of the heatin the massbetween hence distortion of the liners the. liners, and avoided, in

C ARLES s. BROWN.

CERTIFICATE OF CQRREiI'iiQN.

Paten'i No. 2,012,740. August 27, 1935.

CHARLES 3. BROWN.

it is hereby certified that error appears in the printed specificationof the a sove numbered patent requiring correction as follows: iage 2.,first column, after iine 2), insert the Words By this construction, thecylinder bores of an air cooled iiiocir can be located eiose together,and the cylinders as efficiently eooied as in nir cooieci engines Whereindividual cylinders are used toprovide a cooling air space betweenthem: and that the said Letters Patent should be read with thiscorrection therein that the same may conform to the record of the easein the Patent Office.

Signed and seaied this 8th day oi iietober, A. D. 1935.

Leslie Frazer (Seai) Acting Commissioner of Patente.

